Home / 3,981.78-5,496.39-2,862.90

Finding the Fourth Proportional to 3,981.78, 5,496.39 and 2,862.90

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Solution

The fourth proportional to 3,981.78, 5,496.39 and 2,862.90 is: 3,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.78 : 5,496.39 = 2,862.90 : x
  2. Step 2: Convert to fraction form
    3,981.78/5,496.39 = 2,862.90/x
  3. Step 3: Cross multiply
    3,981.78x = 5,496.39 × 2,862.90
  4. Step 4: Simplify right side
    3,981.78x = 15,735,614.93
  5. Step 5: Solve for x
    x = 15,735,614.93/3,981.78
  6. Step 6: Final answer
    x = 3,951.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.